dexorder

2024-10-17 02:42:28 -04:00
commit 25def69c66
878 changed files with 112489 additions and 0 deletions
--- a/lib_openzeppelin_contracts/contracts/token/ERC721/utils/ERC721Holder.sol
+++ b/lib_openzeppelin_contracts/contracts/token/ERC721/utils/ERC721Holder.sol
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/utils/ERC721Holder.sol)
+
+pragma solidity ^0.8.20;
+
+import {IERC721Receiver} from "../IERC721Receiver.sol";
+
+/**
+ * @dev Implementation of the {IERC721Receiver} interface.
+ *
+ * Accepts all token transfers.
+ * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or
+ * {IERC721-setApprovalForAll}.
+ */
+abstract contract ERC721Holder is IERC721Receiver {
+    /**
+     * @dev See {IERC721Receiver-onERC721Received}.
+     *
+     * Always returns `IERC721Receiver.onERC721Received.selector`.
+     */
+    function onERC721Received(address, address, uint256, bytes memory) public virtual returns (bytes4) {
+        return this.onERC721Received.selector;
+    }
+}